Many Illinois homeowners are unsure whether to hire an interior designer or an architect first. The answer depends on what you plan to change. This guide explains the difference between the two roles, shows which projects need which professional, and describes how they work together. If you are searching for an interior designer in Illinois or an architect for your home, this overview will help you start in the right place.
Two roles that overlap
Architects and interior designers both shape the spaces where people live and work. Their training, focus and legal authority differ, though they often collaborate.
An architect is trained in building structure, safety, codes and design. They can prepare the drawings that building offices require for permits when a project changes the structure, the layout of walls, exits or the use of a building. In Illinois, architects must be licensed by the state.
An interior designer focuses on the inside of the building. They plan layouts, select materials and finishes, choose furniture and lighting, and create a look that supports how you live. Some are trained to prepare technical drawings, and some specialise in kitchens, bathrooms or commercial interiors.
When to start with an architect
Start with an architect when your plan changes the building itself. Common examples include adding a room, building a second floor, opening a load bearing wall, moving stairs, changing windows or building a new home.
These changes affect structure, safety and code compliance. They also usually require permits and engineered details. An architect coordinates these steps and prepares the drawings that a builder and the village or city will review.
If you are building or buying a home and want custom design, an architect also helps you think about the site, sunlight, views and the way rooms connect. These early decisions shape comfort for decades.
When to start with an interior designer
Start with an interior designer when the walls stay mostly in place and you want the rooms to work better and feel better. Examples include choosing paint and flooring, planning furniture layouts, selecting window treatments and lighting, and updating a kitchen or bathroom with new surfaces.
A designer is also a strong choice if you feel overwhelmed by choices. They narrow options, show you how materials look together and help you avoid costly mistakes, such as a finish that clashes with your natural light.
Some projects blur the line. A kitchen update that moves one wall might need both. In those cases, a firm that offers both services is easier to manage than two separate teams.
How licensing works in Illinois
Architects in Illinois are licensed through the state, which sets standards for education, experience and examination. You can check a licence through the state professional regulation department.
Interior design in Illinois has its own rules. The state regulates the title Registered Interior Designer, and designers using it must meet requirements. Many skilled designers also work as decorators or consultants without that title, and they may work on projects that do not need permits.
Ask any professional what they are licensed or certified to do. A clear answer shows that they understand the boundaries of their role and will tell you when you need someone else.
Cost and fees
Fees vary by project size, complexity and the services you need. Architects often charge a fixed fee or a percentage of construction cost. Interior designers may charge hourly, by the project or through a mix of design fees and product purchases.
Ask for a written scope and fee proposal from each professional. Compare what is included, such as site visits, drawings, selections and construction support. A lower fee that excludes key services may cost more overall.
Remember that good design can save money. A well planned layout avoids rework, and clear drawings reduce change orders during construction.
The benefit of one team
Projects often run best when architecture and interiors are planned together. When one team handles both, the walls, windows, lighting and finishes are coordinated from the start. Questions about where an outlet goes or how a cabinet fits are answered inside one office.
This also helps with budgeting. The team sees how structural choices affect interior costs and can suggest trade offs early. You receive one set of drawings and one point of contact.
Learn more about how a firm that provides architecture and interior design services can coordinate every stage, from first sketch to the final walk through.
Questions to ask before hiring
Whichever professional you choose, ask a few questions. How many projects like mine have you completed in Illinois? Who will work on my project day to day? How do you handle changes once drawings are approved? How do you work with builders?
Ask to see finished work and speak with past clients. Ask how the professional communicates, because regular updates make a project far less stressful.
Check that the professional carries insurance and holds the required licences. These basic steps protect you and show professionalism.
How the work flows from start to finish
A typical project starts with a consultation to understand goals, budget and site conditions. Next comes concept design, where layouts and looks are explored. After you approve a direction, the team prepares detailed drawings and specifications.
Permits and bids follow. During construction, the designer or architect answers questions, reviews the work and helps solve problems. The project ends with a walk through and a list of any remaining corrections.
Throughout, your involvement matters. Timely decisions keep the schedule on track, and clear feedback keeps the design true to your goals.
Planning for the long term
Whichever role you hire first, think about how you will use the home in five or ten years. Children grow up, parents move in, and work habits change. A plan that allows a spare room to become an office, or a main floor bedroom to serve a family member later, stays useful for longer.
Also think about upkeep. Durable materials, simple mechanical systems and good natural light lower costs year after year. A professional who asks about your long term plans, not only your immediate wishes, is giving you better advice.
Frequently asked questions
Can an interior designer prepare drawings for permits?
It depends on the scope and local rules. Projects that change structure, exits or the use of a building usually need drawings from a licensed architect.
Is an architect only for new homes?
No. Architects also design additions, renovations and commercial spaces. Many homeowners hire one for a single room addition.
What is the difference between a decorator and an interior designer?
A decorator focuses on furnishings and styling. An interior designer plans layouts, selects materials and may prepare technical drawings, depending on training and credentials.
Can one firm provide both services?
Yes. Some firms employ architects and interior designers who work together, which simplifies coordination.
How early should I hire a professional?
As early as possible. Early advice can shape decisions about budget, site and layout, and it prevents costly changes later.
